docs: def download_from_s3(self,bucket_name,s3_key,
                       output_filename='temp_zappa_settings.py'):
          """
          Download a file from S3
          :param bucket_name: Name of the S3 bucket (string)
          :param s3_key: Name of the file hosted on S3 (string)
          :param output_filename: Name of the file the download operation
          will create (string)
          :return: False or the value of output_filename
          """
          s3 = boto3.resource('s3')
          bucket = s3.Bucket(bucket_name)
          try:
              s3.meta.client.head_object(Bucket=bucket_name,Key=s3_key)
          except botocore.exceptions.ClientError:
              return False
          print(u'Downloading the settings file ({0}) from S3'.format(s3_key))
          new_file = bucket.download_file(s3_key,output_filename)
          return output_filename